CN110194646B - Mining inorganic rapid-setting perfusion blasting hole sealing material and preparation method thereof - Google Patents
Mining inorganic rapid-setting perfusion blasting hole sealing material and preparation method thereof Download PDFInfo
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- CN110194646B CN110194646B CN201910547093.2A CN201910547093A CN110194646B CN 110194646 B CN110194646 B CN 110194646B CN 201910547093 A CN201910547093 A CN 201910547093A CN 110194646 B CN110194646 B CN 110194646B
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- 239000003566 sealing material Substances 0.000 title claims abstract description 80
- 238000005422 blasting Methods 0.000 title claims abstract description 51
- 230000010412 perfusion Effects 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 238000005065 mining Methods 0.000 title claims abstract description 20
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000002131 composite material Substances 0.000 claims abstract description 36
- 239000004568 cement Substances 0.000 claims abstract description 29
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 29
- 239000010440 gypsum Substances 0.000 claims abstract description 29
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 27
- 239000010881 fly ash Substances 0.000 claims abstract description 27
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 26
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 26
- 239000004571 lime Substances 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 24
- 230000000996 additive effect Effects 0.000 claims abstract description 23
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 21
- 239000011734 sodium Substances 0.000 claims abstract description 21
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 21
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 16
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 7
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical group O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 1
- 239000011707 mineral Substances 0.000 claims 1
- 235000010755 mineral Nutrition 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 46
- 239000002002 slurry Substances 0.000 abstract description 40
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 5
- 239000002910 solid waste Substances 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 53
- 239000002994 raw material Substances 0.000 description 20
- 239000007789 gas Substances 0.000 description 19
- 238000007789 sealing Methods 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 18
- 238000002347 injection Methods 0.000 description 14
- 239000007924 injection Substances 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 231100000331 toxic Toxicity 0.000 description 5
- 230000002588 toxic effect Effects 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 229910010272 inorganic material Inorganic materials 0.000 description 4
- 239000011147 inorganic material Substances 0.000 description 4
- 239000011440 grout Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052925 anhydrite Inorganic materials 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical group [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002956 ash Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene-acid Natural products C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention provides a mining inorganic rapid-setting perfusion blasting hole sealing material, which comprises the following components in parts by weight: 25-50 parts of sulphoaluminate cement clinker, 20-40 parts of gypsum, 5-10 parts of lime, 25-40 parts of fly ash, 0.5-3 parts of composite additive and 80-110 parts of water; wherein the composite admixture comprises the following components in parts by weight: 50-75 parts of water reducing agent, 10-30 parts of anhydrous sodium sulphate, 2.5-25 parts of sodium metaaluminate and 1-10 parts of gas former. The hole sealing material preparation method of the invention is simple in process, and the prepared hole sealing material slurry has high fluidity and better water retention; the initial setting time is adjustable within 20-35 minutes; the vertical expansion rate after hardening is between 1 and 10 percent; the compressive strength of the material is 2-4 MPa after 1.5 h. The invention has the advantages of simple construction process, low labor intensity, low production cost and the like, and the whole process not only does not generate three wastes, but also can utilize solid wastes and does not influence the environment.
Description
Technical Field
The invention belongs to the technical field of coal mine hole sealing, and particularly relates to an inorganic rapid-setting perfusion blasting hole sealing material for a mine and a preparation method thereof.
Background
The deep hole blasting of the coal mine is a common technical means such as roof presplitting, coal body pressure relief, etc., according to the general 1/3 that is not less than the hole depth of specified hole sealing depth, the hole sealing of blasting is for effectively resisting and buffering the shock stress wave that the explosive produced when the deep hole blasting, reduce the loss of blasting energy, make full use of the explosive energy, improve the presplitting blasting effect. At present, the stemming filling mode is mainly adopted, the problems of low efficiency, high labor intensity and the like exist, and the stemming can be flushed out when the tamping is not carried out, so that the blasting effect is seriously influenced. Coal mine blasting safety processes are many, still need have a power failure, remove the people, influence other mining operations, especially when carrying out large aperture, deep hole blasting, the stemming is clogged and is needed 2 ~ 3h, in addition other processes, only can accomplish 1~ 3 drilling blasting in a class during the construction, intensity of labour is very big moreover.
The pouring type hole sealing is adopted, liquid hole sealing materials are poured into a hole sealing section, a grout naturally forms a blasting hole sealing section after solidification, the pouring materials are made of common cement and accelerator composite materials at present, although the solidification time is short, the required strength is achieved for a long time, blasting can be implemented only by maintaining for more than 6 hours, deep hole blasting generally requires to be completed on duty, the waiting time is long, and normal blasting operation can be seriously influenced. Although the high polymer material has high solidification speed and can achieve the effect of rapid hole sealing, the reaction temperature in the solidification process is higher than 200 ℃, serious potential safety hazards exist, organic components are combusted in the blasting process, toxic and harmful gases are generated, and the difference between the organic components and stemming materials is large.
At present, no hole sealing material with high consolidation and solidification speed, high strength, low reaction temperature, high safety and no pollution exists.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a mining inorganic rapid-setting perfusion blasting hole sealing material which can meet the requirements of a construction stage, can be rapidly solidified and hardened and has the characteristic of micro-expansion and a preparation method thereof.
In order to achieve the above purpose, the invention provides the following technical scheme:
the mining inorganic rapid-setting perfusion blasting hole sealing material is characterized by comprising the following components in parts by weight:
25-50 parts of sulphoaluminate cement clinker, 20-40 parts of gypsum, 5-10 parts of lime, 25-40 parts of fly ash, 0.5-3 parts of composite additive and 80-110 parts of water;
wherein the composite additive comprises a water reducing agent, anhydrous sodium sulphate, sodium metaaluminate and a gas former.
Preferably, the composite additive comprises, by weight, 50-75 parts of a water reducing agent, 10-30 parts of anhydrous sodium sulphate, 2.5-25 parts of sodium metaaluminate and 1-10 parts of an air forming agent.
Preferably, the mining inorganic rapid-setting perfusion blasting hole sealing material comprises the following components in parts by weight: 35 parts of sulphoaluminate cement clinker, 25 parts of gypsum, 8 parts of lime, 30 parts of fly ash, 2 parts of composite additive and 90 parts of water;
wherein the composite admixture comprises: 60 parts of water reducing agent, 20 parts of anhydrous sodium sulphate, 15 parts of sodium metaaluminate and 5 parts of gas former.
In the inorganic rapid-setting perfusion blasting hole sealing material for the mine, preferably, the specific surface area of the sulphoaluminate cement clinker is not less than 350m2/kg。
Preferably, the gypsum is anhydrite, and the specific surface area of the gypsum is not less than 350m2/kg；
Preferably, the gypsum is fluorogypsum.
In the inorganic rapid-setting perfusion blasting hole sealing material for the mine, preferably, the specific surface area of the lime is not less than 350m2/kg；
Preferably, the lime is slaked lime powder or quicklime.
In the inorganic rapid-setting perfusion blasting hole sealing material for the mine, preferably, the specific surface area of the fly ash is not less than 300m2/kg。
Preferably, the water reducing agent is a naphthalene water reducing agent.
Preferably, the anhydrous sodium sulfate is anhydrous sodium sulfate, and the purity of the anhydrous sodium sulfate is more than 99%;
preferably, the purity of the sodium metaaluminate is above 80%.
Preferably, the gas generating agent is aluminum powder paste.
A preparation method of an inorganic rapid-setting perfusion blasting hole sealing material for mines comprises the following steps:
weighing a water reducing agent, anhydrous sodium sulphate, sodium metaaluminate and a gas former, putting the materials into a first container, and uniformly mixing and stirring to obtain composite additive powder;
weighing sulphoaluminate cement clinker, gypsum, lime and fly ash, putting the sulphoaluminate cement clinker, the gypsum, the lime and the fly ash into a second container, adding the composite additive powder, and uniformly mixing and stirring to obtain a hole sealing material powder material;
and step three, adding water into the hole sealing material powder prepared in the step two, and mixing and stirring uniformly to obtain the hole sealing material.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
the invention utilizes the characteristics of early strength and rapid hardening of the sulphoaluminate cement, simultaneously ensures the fluidity, the strength between 20 and 35 minutes after hardening and the micro expansibility after hardening by adding the water reducing agent, the early strength agent, the gas generating agent and the like, and reduces the highest temperature of early reaction by adding the fly ash.
The invention has better fluidity within 15 minutes so as to meet the perfusion requirement; the sealing material can be quickly condensed and hardened within 20-30 minutes, the highest temperature in the hardening process is not more than 45 ℃, the sealing material is poured into a hole sealing section through a pneumatic grouting pump after the sealing material is charged, the compression strength can reach 2-4 MPa within 1.5 hours, the blasting can be carried out, and the strength of the sealing material can be adjusted according to the hole sealing length; the hardened material has micro-expansibility, and the vertical expansion rate is 1-10%.
In a word, the invention has the characteristics of short production period and low production cost, is made of pure inorganic materials, does not burn in the blasting process, does not generate toxic and harmful gases, does not generate three wastes in the whole process, can utilize solid wastes, and does not influence the environment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The present invention will be described in detail with reference to examples. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The mining inorganic rapid-setting perfusion blasting hole sealing material provided by the invention utilizes the characteristics of early strength and rapid hardening of sulphoaluminate cement, and simultaneously, the hole sealing slurry has better service performance by adding a water reducing agent, an early strength agent, a gas generating agent and the like. Pouring liquid hole sealing materials into the hole sealing section by adopting pouring type hole sealing, wherein the grout naturally forms a blasting hole sealing section after being solidified, and the grout has better fluidity within 15 minutes so as to meet the pouring requirement; can be rapidly solidified and hardened within 20-35 minutes to shorten the waiting time for reaching proper strength; the hardened micro-expansibility is 1-10% of the vertical expansion rate; the highest temperature of early reaction is reduced by adding the fly ash, the highest temperature in the hardening process is not more than 45 ℃, and the pure inorganic material does not generate toxic and harmful gases; and the powder is filled into the hole sealing section through a pneumatic grouting pump, the compressive strength can reach 2-4 MPa after 1.5h, the blasting can be implemented, the strength of the hole sealing material can be adjusted according to the hole sealing length, and the longer the hole sealing length is, the lower the required strength of the hole sealing material is.
The hole sealing material slurry prepared by the preparation method of the inorganic rapid-setting perfusion blasting hole sealing material for the mine is applied to blasting perfusion grouting, can be rapidly solidified and hardened, has the characteristic of micro-expansion, improves the production period, reduces the production cost, does not generate solid waste in the process, and is green, environment-friendly and healthy in the whole production process.
The invention provides a mining inorganic rapid-setting perfusion blasting hole sealing material which comprises the following components in parts by weight:
25-50 parts (such as 25 parts, 27 parts, 29 parts, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts and 50 parts) of sulphoaluminate cement clinker, 20-40 parts (such as 22 parts, 24 parts, 26 parts, 28 parts, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts and 40 parts) of gypsum, 5-10 parts (such as 6 parts, 7 parts, 8 parts, 9 parts and 10 parts) of lime, 25-40 parts (such as 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts and 40 parts) of composite additive, 0.5-3 parts (such as 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, 1.5 part, 2 parts, 2.5 parts and 3 parts) of water, 80-110 parts (such as 82 parts, 85 parts, 87 parts, 90 parts, 92 parts, 95 parts, 97 parts, 106 parts, 102 parts and 100 parts);
the composite additive comprises 50-75 parts (such as 52 parts, 54 parts, 55 parts, 56 parts, 58 parts, 60 parts, 62 parts, 64 parts, 65 parts, 66 parts, 68 parts, 70 parts, 72 parts, 74 parts and 75 parts) of a water reducing agent, 10-30 parts (such as 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts and 30 parts) of anhydrous sodium sulphate, 2.5-25 parts (such as 2.7 parts, 2.9 parts, 3 parts, 5 parts, 7 parts, 9 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, 22 parts, 24 parts and 25 parts) of sodium metaaluminate, and 1-10 parts (such as 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts and 10 parts) of a gas generating agent.
Preferably, the hole sealing material comprises the following components in parts by weight: 35 parts of sulphoaluminate cement clinker, 25 parts of gypsum, 8 parts of lime, 30 parts of fly ash, 2 parts of composite additive and 90 parts of water;
wherein, the composite admixture comprises: 60 parts of water reducing agent, 20 parts of anhydrous sodium sulphate, 15 parts of sodium metaaluminate and 5 parts of gas former.
Preferably, the specific surface area of the sulphoaluminate cement clinker is not less than 350m2/kg。
Preferably, the gypsum is anhydrite, and the specific surface area of the gypsum is not less than 350m2Per kg; still more preferably, the gypsum is fluorogypsum.
Preferably, the lime is slaked lime powder or quicklime, and the specific surface area of the lime is not less than 350m2/kg。
Preferably, pulverized coalSpecific surface area of ash of not less than 300m2/kg。
Preferably, the water reducing agent is a naphthalene water reducing agent.
Preferably, the anhydrous sodium sulfate is anhydrous sodium sulfate, and the purity is more than 99%.
Preferably, the purity of the sodium metaaluminate is above 80%.
Preferably, the gas former is aluminum powder paste.
In order to further understand the mining inorganic rapid-hardening perfusion blasting hole sealing material, the invention also provides a preparation method of the mining inorganic rapid-hardening perfusion blasting hole sealing material, and the preparation method comprises the following steps:
weighing a water reducing agent, anhydrous sodium sulphate, sodium metaaluminate and a gas former, putting the materials into a first container, and uniformly mixing and stirring to obtain composite additive powder;
weighing raw materials of sulphoaluminate cement clinker, gypsum, lime and fly ash, putting the raw materials into a second container, adding the composite additive powder, and uniformly mixing and stirring to obtain a hole sealing material powder material;
and step three, adding water into the hole sealing material powder prepared in the step two, and stirring and mixing uniformly to obtain the hole sealing material.
The raw materials used in examples of the present invention and comparative examples 1 and 2 satisfy the following requirements: the sulphoaluminate cement clinker meets the requirement of appendix A of GB 20472-2006 sulphoaluminate cement, and the specific surface area of the sulphoaluminate cement clinker is not less than 350m2Per kg; the gypsum is fluorgypsum with specific surface area not less than 350m2Per kg; the lime is slaked lime powder meeting the requirements of first-class products and/or qualified products in JC/T481-2013 of building material industry standard, and the specific surface area of the slaked lime powder is not less than 350m2Per kg; the fly ash is dry-discharged fly ash of a coal-fired power plant, and the specific surface area of the fly ash is not less than 300m2Per kg; the water reducing agent is naphthalene high-efficiency water reducing agent powder particles; the anhydrous sodium sulfate is anhydrous sodium sulfate, and the mass purity is more than 99%; the sodium metaaluminate is commercially available sodium metaaluminate, and the mass purity is more than 80%; the gas former is aluminum powder paste.
Example 1
The embodiment of the invention provides a mining inorganic rapid-setting perfusion blasting hole sealing material, which comprises the following components in parts by weight: 35 parts of sulphoaluminate cement clinker, 25 parts of gypsum, 8 parts of lime, 30 parts of fly ash, 2 parts of composite additive and 90 parts of water; wherein the composite admixture comprises the following components in parts by weight: 60 parts of water reducing agent, 20 parts of anhydrous sodium sulphate, 15 parts of sodium metaaluminate and 5 parts of gas former.
The preparation method of the inorganic rapid-setting perfusion blasting hole sealing material for the mine in the embodiment comprises the following steps:
firstly, adding 600g of naphthalene water reducer, 200g of anhydrous sodium sulphate, 150g of sodium metaaluminate and 50g of aluminum powder paste into a mixer, uniformly mixing, and obtaining a composite additive after the detection is qualified;
and secondly, weighing 3500g of sulphoaluminate cement clinker, 2500g of gypsum, 800g of lime, 3000g of fly ash and 200g of composite additive as main materials, putting the main materials and the composite additive into a mixing stirrer, stirring the materials uniformly, adding 9000g of tap water, and stirring the materials uniformly to obtain the hole sealing material slurry.
Performance testing
Testing the fluidity, the initial setting time, the 1.5h compressive strength, the highest reaction temperature and the vertical expansion rate of the hole sealing material slurry prepared in the embodiment of the invention, wherein the fluidity is tested according to GB 50119 and 2003 appendix A; the initial setting time is regulated according to GB/T1346-; the 1.5h compressive strength is carried out according to GB/T17671-1999, and the specification of the test block is prepared as follows: 70.7mm × 70.7mm × 70.7 mm; testing the highest reaction temperature by adopting a vacuum cup; the vertical expansion rate is carried out in accordance with GB 50119 and 2003 appendix C.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 280 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 28min, the compressive strength of 1.5h is 3.63MPa, the highest reaction temperature is 43.1 ℃, and the vertical expansion rate after hardening is 5.85%.
Example 2
In this example, the amount of water added in the second step of the preparation method was changed to 8000g, and the other method steps and the amount of raw materials were the same as in example 1, and will not be described again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 260 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 25min, the compressive strength of 1.5h is 3.95MPa, the highest reaction temperature is 44.6 ℃, and the vertical expansion rate after hardening is 8.9%.
Example 3
In this example, the amount of water added in the second step of the preparation method was changed to 10000g, and the other method steps and the amount of raw materials were the same as in example 1, and are not described herein again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 295 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 31min, the compressive strength of 1.5h is 3.15MPa, the highest reaction temperature is 41.8 ℃, and the vertical expansion rate after hardening is 3.52%.
Example 4
In this example, the amount of water added in the second step of the preparation method was changed to 11000g, and the other method steps and the amount of raw materials were the same as in example 1, and will not be described again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 315 mm.
Constructing by a grouting pump to prepare a test block, and measuring that the initial setting time is 33min, the compressive strength of 1.5h is 2.57MPa, the highest reaction temperature is 40.1 ℃, and the vertical expansion rate after hardening is 1.69%.
Example 5
In this example, the amount of the composite admixture used in the second step of the preparation method was changed to 50g, and the other method steps and the amount of the raw materials were the same as those in example 1, and are not described herein again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 250 mm.
Constructing by a grouting pump to prepare a test block, and measuring that the initial setting time is 35min, the compressive strength of 1.5h is 3.95MPa, the highest reaction temperature is 39.6 ℃, and the vertical expansion rate after hardening is 1.51%.
Example 6
In this example, the amount of the composite admixture used in the second step of the preparation method was changed to 100g, and the other method steps and the amount of the raw materials used were the same as in example 1, and are not described herein again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 265 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 31min, the compressive strength of 1.5h is 3.63MPa, the highest reaction temperature is 41.3 ℃, and the vertical expansion rate after hardening is 3.62%.
Example 7
In this example, the amount of the composite admixture used in the second step of the preparation method was changed to 300g, and the other method steps and the amount of the raw materials were the same as those in example 1, and are not described herein again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the sealing material slurry prepared in the example of the present invention was 305 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 25min, the compressive strength of 1.5h is 2.57MPa, the highest reaction temperature is 44.9 ℃, and the vertical expansion rate after hardening is 8.38%.
Example 8
In this example, the amount of the main material used in the second step of the preparation method was changed, and 2500g of sulphoaluminate cement clinker, 2000g of gypsum, 1000g of lime and 4000g of fly ash were used, and the other method steps and the amounts of the raw materials were the same as those in example 1, and are not described herein again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 335 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 43min, the compressive strength of 1.5h is 2.06MPa, the highest reaction temperature is 36.8 ℃, and the vertical expansion rate after hardening is 1.01%.
Example 9
In this example, the amount of the main material used in the second step of the preparation method was changed, and 3000g of sulphoaluminate cement clinker, 2500g of gypsum, 800g of lime and 3700g of fly ash were used, and the other method steps and the amount of the raw material used were the same as in example 1, and are not described herein again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 315 mm.
Constructing by a grouting pump to prepare a test block, and measuring that the initial setting time is 36min, the compressive strength of 1.5h is 2.85MPa, the highest reaction temperature is 39.5 ℃, and the vertical expansion rate after hardening is 3.72%.
Example 10
In this example, the amount of the main material used in the second step of the preparation method was changed, 3500g of sulphoaluminate cement clinker, 2500g of gypsum, 800g of lime and 3200g of fly ash were used, and the other method steps and the amounts of the raw materials were the same as those in example 1, and are not described herein again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 280 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 31min, the compressive strength of 1.5h is 3.31MPa, the highest reaction temperature is 41.3 ℃, and the vertical expansion rate after hardening is 5.63%.
Example 11
In this example, the amount of the main material used in the second step of the preparation method was changed, 4000g of sulphoaluminate cement clinker, 3000g of gypsum, 500g of lime and 2500g of fly ash were used, and the other method steps and the amounts of the raw materials were the same as those in example 1, and are not described herein again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 265 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 22min, the compressive strength of 1.5h is 3.92MPa, the highest reaction temperature is 44.6 ℃, and the vertical expansion rate after hardening is 8.52 percent.
Example 12
In this example, the amount of the main material used in the second step of the preparation method was changed, and 4500g of sulphoaluminate cement clinker, 3500g of gypsum, 700g of lime and 3000g of fly ash were used, and the other method steps and the amounts of the raw materials were the same as those in example 1, and are not described herein again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the sealing material slurry prepared in the embodiment of the invention is 275 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 26min, the compressive strength of 1.5h is 3.59MPa, the highest reaction temperature is 43.2 ℃, and the vertical expansion rate after hardening is 6.61%.
Example 13
In this embodiment, the composition parts of the raw materials of the composite admixture in the first step of the preparation method are changed, 500g of naphthalene water reducer, 150g of anhydrous sodium sulphate, 100g of sodium metaaluminate and 30g of aluminum paste are adopted, and the other method steps and the raw material usage amount are the same as those in embodiment 1, and are not described again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 273 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 29min, the compressive strength of 1.5h is 3.59MPa, the highest reaction temperature is 42.5 ℃, and the vertical expansion rate after hardening is 6.63%.
Example 14
In this embodiment, the composition parts of the raw materials of the composite admixture in the first step of the preparation method are changed, 750g of naphthalene water reducer, 250g of anhydrous sodium sulfate, 250g of sodium metaaluminate and 100g of aluminum paste are adopted, and the other method steps and the raw material usage amount are the same as those in embodiment 1, and are not described again.
The plugging material slurry prepared in this example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods being the same as those in example 1.
The fluidity of the hole sealing material slurry prepared in the embodiment of the invention is 303 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 32min, the compressive strength of 1.5h is 3.9MPa, the highest reaction temperature is 42.6 ℃, and the vertical expansion rate after hardening is 7.61%.
Comparative example 1
The difference between comparative example 1 and example 1 is that no fly ash is added in the second step of preparation, and the other steps and the amount of the raw materials are the same as those in example 1, and are not described again.
The pore sealing material slurry prepared in the comparative example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods were the same as those in example 1.
The fluidity of the sealing material slurry prepared in the comparative example of the present invention was 265 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 15min, the compressive strength of 1.5h is 5.3MPa, the highest reaction temperature is 59.5 ℃, and the vertical expansion rate after hardening is 10.6%.
Comparative example 2
The difference between the comparative example 2 and the example 1 is that the addition amount of the aluminum powder paste as the gas former in the first step of the preparation step is 150g, and the other steps and the raw material consumption are the same as those in the example 1, and are not repeated herein.
The pore sealing material slurry prepared in the comparative example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods were the same as those in example 1.
The fluidity of the sealing material slurry prepared in the comparative example of the present invention was 270 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 16min, the compressive strength of 1.5h is 1.5MPa, the highest reaction temperature is 48.1 ℃, and the vertical expansion rate after hardening is 16.8%.
Comparative example 3
Comparative example 3 differs from example 1 in that the specific surface area of the sulphoaluminate cement clinker used in the second step is 305m2/kg, less than 350m2/kg, specific surface area of gypsum used was 297m2/kg, less than 350m2Kg, other steps and amounts of starting materials corresponding to example 1And, as such, will not be described in detail herein.
The pore sealing material slurry prepared in the comparative example was subjected to fluidity, initial setting time, 1.5h compressive strength, maximum reaction temperature and vertical expansion rate tests, the test standards and methods were the same as those in example 1.
The fluidity of the sealing material slurry prepared in the comparative example of the present invention was 285 mm.
And constructing by using an injection pump to prepare a test block, wherein the initial setting time is 45min, the compressive strength of 1.5h is 1.1MPa, the highest reaction temperature is 39 ℃, and the vertical expansion rate after hardening is 3.5 percent.
The following table 1 shows performance data of the sealing materials prepared in examples 1 to 14 and comparative examples 1 to 3.
TABLE 1 Properties of sealing materials of various examples and comparative examples
| Item | Fluidity/mm | Initial setting time/min | 1.5h compressive strength/MPa | Maximum reaction temperature/. degree.C | Vertical swelling rate/%) |
| Example 1 | 280 | 28 | 3.63 | 43.1 | 5.85 |
| Example 2 | 260 | 25 | 3.95 | 44.6 | 8.9 |
| Example 3 | 295 | 31 | 3.15 | 41.8 | 3.52 |
| Example 4 | 315 | 33 | 2.57 | 40.1 | 1.69 |
| Example 5 | 250 | 35 | 3.95 | 39.6 | 1.51 |
| Example 6 | 265 | 31 | 3.63 | 41.3 | 3.62 |
| Example 7 | 305 | 25 | 2.57 | 44.9 | 8.38 |
| Example 8 | 335 | 33 | 2.06 | 36.8 | 1.01 |
| Example 9 | 315 | 35 | 2.85 | 39.5 | 3.72 |
| Example 10 | 280 | 31 | 3.31 | 41.3 | 5.63 |
| Example 11 | 265 | 22 | 3.92 | 44.6 | 8.52 |
| Example 12 | 275 | 26 | 3.59 | 43.2 | 6.61 |
| Example 13 | 273 | 29 | 3.59 | 42.5 | 6.63 |
| Example 14 | 303 | 32 | 3.9 | 42.6 | 7.61 |
| Comparative example 1 | 265 | 15 | 5.3 | 59.5 | 10.6 |
| Comparative example 2 | 270 | 16 | 1.5 | 48.1 | 16.8 |
| Comparative example 3 | 285 | 45 | 1.1 | 39 | 3.5 |
The performance data in the table can be obtained, the slurry prepared by the mining inorganic rapid-setting perfusion blasting hole sealing material prepared in the embodiment of the invention has good fluidity, and the early fluidity of the material is ensured by adding composite additives such as a high-efficiency water reducing agent, an early strength agent (anhydrous sodium sulphate), a gas generating agent and the like in proper proportion; meanwhile, the initial setting time can be adjusted, and in the examples 1 to 7, the initial setting time is prolonged by increasing the addition of water under the condition that the addition of the main material and the composite admixture is not changed; when the addition amount of the main material and the water is not changed, the initial setting time is reduced by increasing the addition amount of the composite additive; in a word, the hole sealing material slurry can be quickly coagulated and hardened within 20-35 minutes, and the coagulation speed is high; the hardened hole sealing material has 1-10% of micro-expansibility, the proper expansion can improve the hole sealing effect of the hole sealing material, but the excessive expansion can influence the self strength of the material, and the hole sealing material disclosed by the invention has proper micro-expansibility and better early strength; and the highest temperature of early reaction can be reduced by adding the fly ash.
In summary, the following steps: therefore, the pouring type blasting hole sealing material has the characteristics of quick setting, quick hardening and micro expansion, the highest temperature in the curing process is 45 ℃ (the required reaction temperature is low, and the high-temperature construction potential safety hazard does not exist in the construction process), the material is pure inorganic material, the material does not burn in the blasting process, no toxic and harmful gas is generated, and the mechanical property of the material after curing is closest to that of stemming; the sealing hole section is filled through a pneumatic grouting pump, the compression strength can reach 2-4 MPa after 1.5 hours, the blasting can be implemented, and the sealing hole section has the characteristics of short production period and low production cost, is made of pure inorganic materials, does not burn in the blasting process, does not generate toxic and harmful gases, does not generate three wastes in the whole process, can utilize solid wastes, and does not influence the environment.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The mining inorganic rapid-setting perfusion blasting hole sealing material is characterized by comprising the following components in parts by weight:
35-50 parts of sulphoaluminate cement clinker, 25-40 parts of gypsum, 7-8 parts of lime, 30 parts of fly ash, 2 parts of composite additive and 90 parts of water;
wherein the composite additive consists of a water reducing agent, anhydrous sodium sulphate, sodium metaaluminate and a gas former;
the composite admixture comprises, by weight, 50-75 parts of a water reducing agent, 10-20 parts of anhydrous sodium sulphate, 10-25 parts of sodium metaaluminate and 1-5 parts of a gas former;
the gypsum is fluorgypsum, and the specific surface area of the gypsum is not less than 350m2/kg；
The lime is slaked lime powder;
the specific surface area of the sulphoaluminate cement clinker is not less than 350m2/kg；
The gas former is aluminum powder paste.
2. The mining inorganic rapid-setting perfusion blasting hole sealing material according to claim 1, characterized in that the hole sealing material comprises the following components in parts by weight: 35 parts of sulphoaluminate cement clinker, 25 parts of gypsum, 8 parts of lime, 30 parts of fly ash, 2 parts of composite additive and 90 parts of water.
3. The mining inorganic rapid-setting perfusion blasting hole sealing material of claim 2, wherein the composite additive comprises, in parts by weight: 60 parts of water reducing agent, 20 parts of anhydrous sodium sulphate, 15 parts of sodium metaaluminate and 5 parts of gas former.
4. The mining inorganic rapid-setting perfusion blasting hole sealing material as claimed in claim 1, wherein the specific surface area of the lime is not less than 350m2/kg。
5. The mineral inorganic of claim 1The quick-setting perfusion blasting hole sealing material is characterized in that the specific surface area of the fly ash is not less than 300m2/kg。
6. The mining inorganic rapid-setting perfusion blasting hole sealing material of claim 1, characterized in that the water reducing agent is a naphthalene water reducing agent.
7. The mining inorganic rapid-setting perfusion blasting hole sealing material of claim 1, wherein the anhydrous sodium sulfate is anhydrous sodium sulfate, and the purity is more than 99%.
8. The mining inorganic rapid-setting perfusion blasting hole sealing material of claim 7, wherein the purity of the sodium metaaluminate is more than 80%.
9. The preparation method of the inorganic rapid-setting perfusion blasting hole sealing material for the mine according to any one of claims 1 to 8, which comprises the following steps:
step one, weighing a water reducing agent, anhydrous sodium sulphate, sodium metaaluminate and a gas former according to a ratio, putting the materials into a first container, and uniformly mixing and stirring the materials to obtain composite additive powder;
step two, weighing sulphoaluminate cement clinker, gypsum, lime and fly ash according to the proportion, putting the sulphoaluminate cement clinker, the gypsum, the lime and the fly ash into a second container, adding the composite additive powder in the step one, and uniformly mixing and stirring to obtain a hole sealing material powder material;
and step three, adding water into the hole sealing material powder prepared in the step two, and mixing and stirring uniformly to obtain the hole sealing material.
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| CN113149570A (en) * | 2021-05-11 | 2021-07-23 | 山东尔多新材料有限公司 | Novel blast hole sealing grouting material and preparation method thereof |
| CN113754399B (en) * | 2021-09-18 | 2022-11-01 | 河南理工大学 | Sulphoaluminate cement and lime-based static blasting agent and preparation method thereof |
| CN114105579B (en) * | 2021-09-18 | 2023-01-31 | 焦作市红石环保科技有限公司 | Aluminate cement and quick lime based static blasting agent and preparation method thereof |
| CN114620988B (en) * | 2022-02-22 | 2022-11-08 | 北京中大昂晟科技发展有限公司 | Quick setting stemming material for blasting hole filling |
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